Unable to log in to user account

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http://www.kubuntuforums.net – Hello, Here is the problem I have with Kubuntu 12.10. I activated the root account and uses it frequently to do diagnostic and test out stuff ( it is faster for me to not type sudo everytime if I am using root). Other than the root account, I have two user account, one is for myself and one for my sister. Since my sister has bought a new laptop and stop using my computer, I decided to delete her account and also accidentally delete my own account. Not a very smart thing but the mistake has been made and most of the important data is kept on another drive. Anyway, I decided to create a n (HowTos)